A deep sea motor

Abstract

The present invention is applicable to the field of deep-sea equipment and discloses a deep-sea motor, including a motor body, a first sealing component, a second sealing component and a controller component. The motor body includes a hollow motor housing, a front end cover, a rear end cover, a motor rotor component, a motor winding component and a motor shaft. The inner side wall of the front end cover is provided with an annular boss, and the front end cover is provided with a pressure relief hole at a position corresponding to the annular boss. The pressure relief holes are respectively connected with the inner cavity of the front end cover and the outside. A pressure relief part is installed in the pressure relief hole. The motor shaft is rotatably arranged in the motor housing. The motor shaft is provided with a first step and a second step. The first sealing component is arranged between the motor shaft and the motor housing and is installed between the first step and the inner side surface of the annular boss. The second sealing component is arranged between the motor shaft and the front end cover and is installed between the second step and the outer side surface of the annular boss. The controller component is arranged on the outer side wall of the motor housing. The deep-sea motor has excellent sealing performance.

Description

Technical Field

[0001] The present invention relates to the field of deep-sea equipment, and in particular to a deep-sea motor. Background Art

[0002] As marine development activities become more frequent and in-depth, human beings are conducting marine oil and gas exploration and exploitation, seabed surveys, seabed pipelines, and marine mineral exploitation. The scope of exploitation has gradually moved from shallow sea to deep sea, and deep-sea equipment has naturally become a necessary tool for human beings to carry out marine activities. For electric underwater equipment, deep-sea motors have been widely used as their core components.

[0003] The deep-sea motor sealing scheme can be roughly divided into two types in principle: pressure-bearing type and pressure-compensation type. The structural principle of the pressure-bearing type is to install the sealing cover on the motor output shaft and install a sealing device on the motor output shaft. The advantage of this structure is that it is compact and occupies less space. The disadvantage is that the sealing cover and sealing ring of the motor must withstand the external water pressure, otherwise any leakage caused by poor sealing will cause damage to the motor. The pressure compensation type, that is, oil filling compensation, is the most commonly used solution. There are various oil filling compensation schemes for motors, and the commonly used ones are membrane compensation, oil bladder compensation and piston compensation. The principle of these schemes is to fill the motor pressure-resistant housing with oil. Under the high water pressure in the deep sea, there is a large pressure difference between the inside and outside of the motor. The compensation membrane, oil bladder or compensation piston deformation installed on the motor achieves the balance of pressure inside and outside the motor. However, in the pressure compensation scheme, the high pressure of the deep sea is transmitted to the cooling oil inside the motor through pressure compensation. The various components inside the motor are immersed in the cooling oil. The motor runs in a high-pressure cooling oil environment, and its internal support plate, bearings, silicon steel sheets, gaskets, etc. will be slightly deformed. In addition, the pressure overcome by the rotor operation increases. The greater the pressure, the lower the efficiency of the motor operation. The reduced motor efficiency greatly affects the endurance of deep-sea equipment when powered by batteries.

[0004] In addition, the main structure of the traditional underwater oil-filled brushless DC motor separates the motor body and the motor controller. The motor controller is placed in a separate sealed cabin and connected by cables in the middle, which makes the overall volume large and there is a risk of interference in signal transmission. In addition, both ends of the cable need to be specially sealed, and there is a great risk of leakage and water ingress when pulled by external forces.

[0005] Therefore, the existing technology still needs to be improved and developed. Summary of the invention

[0006] The object of the present invention is to provide a deep-sea motor, which aims to solve the technical problems of insufficient sealing performance and controller integration of existing deep-sea motors.

[0007] To achieve the above object, the solution provided by the present invention is:

[0008] A deep-sea motor comprises a motor body, a first sealing assembly, a second sealing assembly and a controller assembly, wherein the motor body comprises a hollow motor housing, a front end cover, a rear end cover, a motor rotor assembly, a motor winding assembly and a motor shaft, wherein the front end cover and the rear end cover are respectively arranged on the two end surfaces of the motor housing, an annular boss is arranged on the inner side wall of the front end cover, and a pressure relief hole is arranged at a position of the front end cover corresponding to the annular boss, wherein the pressure relief hole is respectively connected with the inner cavity of the front end cover and the outside, a pressure relief part is installed in the pressure relief hole, the motor rotor assembly is sleeved on the motor shaft, and the motor winding assembly The motor is rotatably arranged in the motor housing, and the motor shaft passes through the front end cover. The motor shaft is provided with a first step and a second step. The first sealing assembly is arranged between the motor shaft and the motor housing, and is installed between the first step and the inner side surface of the annular boss. The second sealing assembly is arranged between the motor shaft and the front end cover, and is installed between the second step and the outer side surface of the annular boss. The controller assembly is arranged on the outer side wall of the motor housing, and the controller assembly is electrically connected to the motor winding assembly.

[0009] Preferably, the first sealing assembly includes a first moving ring and a first stationary ring, the first moving ring and the first stationary ring are respectively sleeved on the motor shaft, and the first moving ring is pressed on the first step, and the first stationary ring is pressed between the first moving ring and the inner side surface of the annular boss.

[0010] Preferably, the second sealing assembly includes a second dynamic ring inner ring, a second dynamic ring outer ring, a second static ring, a static ring sealing ring, a dynamic ring sealing ring and a dynamic ring limiter. The second static ring is sleeved on the motor shaft, an annular protrusion is provided at the outward end of the second dynamic ring inner ring, a limiting mounting hole is radially provided on the second dynamic ring inner ring, the second dynamic ring inner ring is sleeved on the motor shaft and pressed on the second step, the second dynamic ring outer ring is sleeved on the second dynamic ring inner ring and pressed between the second static ring and the annular protrusion, the static ring sealing ring is installed between the second static ring and the front end cover, the dynamic ring sealing ring is installed between the motor shaft and the second dynamic ring inner ring, and the dynamic ring limiter is installed in the limiting mounting hole and abuts against the motor shaft.

[0011] Preferably, the controller assembly includes a controller body and a controller cover, the controller cover is detachably connected to the motor housing, the controller body is arranged in a space enclosed by the motor housing and the controller cover, and the controller body is electrically connected to the motor winding assembly.

[0012] Preferably, the controller component further comprises a power device and a capacitor arranged between the controller body and the controller cover plate, the power device and the capacitor are arranged side by side, and a pin-fin heat dissipation structure is arranged on the controller cover plate.

[0013] Preferably, the pin-fin heat dissipation structure comprises a plurality of cylinders, and the plurality of cylinders are distributed at intervals on the controller cover.

[0014] Preferably, the motor housing includes a motor main housing and a motor lower housing, the outer side wall of the motor main housing radially extends with a first annular portion and a second annular portion, a connecting portion is respectively connected between the first end of the first annular portion and the first end of the second annular portion and between the second end of the first annular portion and the second end of the second annular portion, the first annular portion, the second annular portion and the connecting portions at both ends enclose a mounting groove, the controller body is mounted in the mounting groove, and the controller cover is arranged above the mounting groove and is detachably connected to the first annular portion, the second annular portion and the connecting portion, the motor lower housing is detachably connected to the motor main housing, the rear end cover is detachably connected to the motor lower housing, one end of the motor shaft is rotatably connected to the motor lower housing, and the other end is rotatably connected to one end of the motor main housing away from the motor lower housing.

[0015] Preferably, a low-pressure joint is provided on the rear end cover, and a high-pressure joint is provided on the second annular portion.

[0016] Preferably, the motor body further includes a resolver assembly, the resolver assembly is sleeved on the motor shaft and mounted on the inner wall of the motor lower housing, and the controller body is electrically connected to the resolver assembly.

[0017] Preferably, a planetary gear reducer is further included, wherein the planetary gear reducer is sleeved on the motor shaft and located on the inner side of the first sealing assembly.

[0018] The deep-sea motor provided by the present invention is provided with a first sealing component and a second sealing component, and the first sealing component and the second sealing component are respectively located between the motor shaft and the motor housing and between the motor shaft and the front end cover, forming double sealing protection, effectively preventing deep-sea high-pressure water or other media from entering the interior of the motor, and ensuring the reliability and service life of the motor. Moreover, the deep-sea motor is also provided with a pressure relief hole and a pressure relief part, and the pressure relief hole is connected with the inner cavity of the front end cover and the outside world, so that when the pressure difference between the inside and outside of the deep-sea motor is too large, the air pressure can be balanced by adjusting the pressure relief part to prevent sealing failure or motor damage caused by the pressure difference. In addition, by integrating the controller component into the side wall of the motor housing, not only can the connecting cable between the motor and the controller component be shortened, saving the pressure-resistant joint of this part of the cable, but also the structure is compact, reducing the communication interference between the two. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0020] Figure 1 The structure of the deep sea motor provided by the embodiment of the present invention is shown in FIG. Figure 1 ;

[0021] Figure 2 The structure of the deep sea motor provided by the embodiment of the present invention is shown in FIG. Figure 2 ;

[0022] Figure 3 is a cross-sectional view of a deep-sea motor provided by an embodiment of the present invention;

[0023] Figure 4 yes Figure 3 A is an enlarged view of the middle image.

[0024] Description of Figure Numbers:

[0025] 10. Motor body; 11. Motor housing; 111. Motor main housing; 1111. First annular portion; 1112. Second annular portion; 1113. Connecting portion; 1114. Mounting groove; 112. Motor lower housing; 12. Front end cover; 121. Annular boss; 122. Pressure relief hole; 123. Pressure relief member; 13. Rear end cover; 131. Oiling piston; 14. Motor rotor assembly; 15. Motor winding assembly; 16. Motor shaft; 161. First step; 162. Second step; 17. Low-pressure connector; 18. High-pressure connector; 19. Rotary transformer assembly; 20. First sealing component; 21. First moving ring; 22. First stationary ring; 30. Second sealing component; 31. Second moving ring inner ring; 311. Annular protrusion; 312. Position-limiting mounting hole; 32. Second moving ring outer ring; 33. Second stationary ring; 34. Stationary ring sealing ring; 35. Moving ring sealing ring; 36. Moving ring position-limiting member; 40. Controller component; 41. Controller body; 42. Controller cover; 43. Power device; 44. Capacitor; 45. Pin-fin heat dissipation structure. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0028] It should also be noted that when an element is referred to as being "fixed on" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time.

[0029] In addition, the descriptions of "first", "second", etc. in the present invention are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] like Figures 1 to 4 As shown, it is a deep-sea motor according to an embodiment of the present invention.

[0031] See also Figure 1-Figure 4The deep-sea motor of the embodiment of the present invention comprises a motor body 10, a first sealing assembly 20, a second sealing assembly 30 and a controller assembly 40. The motor body 10 comprises a hollow motor housing 11, a front end cover 12, a rear end cover 13, a motor rotor assembly 14, a motor winding assembly 15 and a motor shaft 16. The front end cover 12 and the rear end cover 13 are respectively arranged on the two end surfaces of the motor housing 11. The inner side wall of the front end cover 12 is provided with an annular boss 121, and the front end cover 12 is provided with a pressure relief hole 122 at a position corresponding to the annular boss 121. The pressure relief hole 122 is respectively connected to the inner cavity of the front end cover 12 and the outside world. A pressure relief part 123 is installed in the pressure relief hole 122. The motor rotor assembly 14 is sleeved on the motor housing 11. On the shaft 16, the motor winding assembly 15 is arranged on the outer ring of the motor rotor assembly 14, the motor shaft 16 is rotatably arranged in the motor housing 11, and the motor shaft 16 passes through the front end cover 12, the motor shaft 16 is provided with a first step 161 and a second step 162, the first sealing assembly 20 is arranged between the motor shaft 16 and the motor housing 11, and is installed between the first step 161 and the inner side surface of the annular boss 121, the second sealing assembly 30 is arranged between the motor shaft 16 and the front end cover 12, and is installed between the second step 162 and the outer side surface of the annular boss 121, the controller assembly 40 is arranged on the outer side wall of the motor housing 11, and the controller assembly 40 is electrically connected to the motor winding assembly 15.

[0032] In this embodiment, the motor housing 11 is a pressure-resistant housing. Under high-pressure conditions, the pressure-resistant housing can ensure the safety of the motor and its surroundings.

[0033] In this embodiment, the first sealing component 20, the second sealing component 30, and the pressure relief component 123 are assembled with the motor housing 11 at the same time. At this time, there is a closed cavity between the first sealing component 20 and the second sealing component 30. Therefore, after the deep-sea motor has worked continuously for many times, there are three different pressures inside the deep-sea motor, outside the deep-sea motor, and in the closed cavity between the first sealing component 20 and the second sealing component 30. In order to balance the air pressure and prevent leakage, a pressure relief hole 122 is designed on the motor housing 11. The pressure relief hole 122 is connected to the inner cavity of the motor housing 11, that is, the pressure relief hole 122 is connected to the closed cavity formed by the first sealing component 20 and the second sealing component 30. When the deep-sea motor is above the water surface, the pressure in the closed cavity is released by disassembling the pressure relief component 123, and the closed cavity and air pressure are kept the same.

[0034] In this embodiment, the pressure relief hole 122 is a threaded hole, and the pressure relief member 123 is a pressure relief screw. After the pressure relief member 123 is removed, it can be immediately tightened and reinstalled, and the pressure relief step is simple to operate.

[0035] In this embodiment, the controller assembly 40 provides voltage and current for the motor body 10 to move, and controls the speed and torque of the motor shaft 16 .

[0036] The deep-sea motor of this embodiment is provided with a first sealing component 20 and a second sealing component 30, which are respectively located between the motor shaft 16 and the motor housing 11 and between the motor shaft 16 and the front end cover 12, forming a double sealing protection, effectively preventing deep-sea high-pressure water or other media from entering the interior of the motor, and ensuring the reliability and service life of the motor. Moreover, the deep-sea motor is also provided with a pressure relief hole 122 and a pressure relief part 123, and the pressure relief hole 122 is connected to the inner cavity of the front end cover 12 and the outside world, so that when the pressure difference between the inside and outside of the deep-sea motor is too large, the air pressure can be balanced by adjusting the pressure relief part 123 to prevent sealing failure or motor damage caused by the pressure difference. In addition, by integrating the controller component 40 into the side wall of the motor housing 11, not only can the connecting cable between the motor and the controller component 40 be shortened, saving the pressure-resistant joint of this part of the cable, but also the structure is compact, reducing the communication interference between the two.

[0037] In this example, see Figure 3 and Figure 4 As shown, exemplarily, the first sealing assembly 20 includes a first dynamic ring 21 and a first static ring 22, and the first dynamic ring 21 and the first static ring 22 are respectively sleeved on the motor shaft 16, and the first dynamic ring 21 is pressed on the first step 161, and the first static ring 22 is pressed between the first dynamic ring 21 and the inner side surface of the annular boss 121.

[0038] In this embodiment, a first elastic member is integrated inside the first dynamic ring 21 . The provision of the first elastic member enables the first dynamic ring 21 and the first static ring 22 to fit more closely, further enhancing the sealing performance.

[0039] Specifically, the first elastic member is a circular spring.

[0040] In this embodiment, the first sealing component 20 is used to seal the motor lubricating oil or air. It relies on the existence of the motor housing 11. Inside the deep-sea motor, the deep-sea pressure will not be transmitted to the internal lubricating oil and air. Therefore, the pressure changes inside the deep-sea motor are mostly caused by temperature changes. The seawater temperature has a small range of variation, and thus the pressure changes inside the deep-sea motor are also small. The sealing pressure requirements for the first sealing component 20 are also relatively low. The first sealing component 20 achieves a high sealing function. The first moving ring 21 is sealed by its lip and the motor shaft 16. The first moving ring 21 and the first static ring 22 are sealed by the end faces of the first moving ring 21 and the first static ring 22.

[0041] In this example, see Figure 3 and Figure 4As shown, exemplarily, the second sealing assembly 30 includes a second dynamic ring inner ring 31, a second dynamic ring outer ring 32, a second static ring 33, a static ring sealing ring 34, a dynamic ring sealing ring 35 and a dynamic ring limiting member 36. The second static ring 33 is sleeved on the motor shaft 16. An annular protrusion 311 is provided at the outward end of the second dynamic ring inner ring 31. A limiting mounting hole 312 is radially provided on the second dynamic ring inner ring 31. The second dynamic ring inner ring 31 is sleeved on the motor shaft 16 and pressed against the second step 162. The second dynamic ring outer ring 32 is sleeved on the second dynamic ring inner ring 31 and pressed between the second static ring 33 and the annular protrusion 311. The static ring sealing ring 34 is installed between the second static ring 33 and the front end cover 12. The dynamic ring sealing ring 35 is installed between the motor shaft 16 and the second dynamic ring inner ring 31. The dynamic ring limiting member 36 is installed in the limiting mounting hole 312 and abuts against the motor shaft 16.

[0042] In this embodiment, the second dynamic ring outer ring 32 is integrated with a second elastic member. The provision of the second elastic member enables the second dynamic ring outer ring 32 and the second static ring 33 to fit more closely, further enhancing the sealing performance.

[0043] Specifically, the second elastic member is a circular spring.

[0044] In this embodiment, both the stationary ring seal ring 34 and the dynamic ring seal ring 35 are O-rings.

[0045] In this embodiment, the dynamic ring limiter 36 is threadedly connected to the limiter mounting hole 312 for easy installation.

[0046] In this embodiment, the second sealing assembly 30 is used to seal seawater. As the depth of seawater increases, the pressure difference between the inside and outside of the deep-sea motor increases, and the internal and external pressures that the second sealing assembly 30 needs to resist increase. The working state becomes worse as the depth increases. The dynamic ring part of the second sealing assembly 30 is provided with a dynamic ring seal 35 for sealing the second dynamic ring inner ring 31 and the motor shaft 16. The dynamic ring limiter 36 is used to tightly fix the dynamic ring assembly (including the second dynamic ring outer ring 32 and the second dynamic ring inner ring 31) and the motor shaft 16 together to prevent relative rotation between the parts. The second dynamic ring outer ring 32 and the second dynamic ring inner ring 31 are integrally cast, and there is no gap between the two to ensure reliable sealing. A spring is also integrated inside the second dynamic ring outer ring 32, so that its end face and the second static ring 33 are tightly sealed. In order to further ensure reliable sealing, a static ring seal 34 is also provided between the second static ring 33 and the motor housing 11 for sealing.

[0047] In this example, see Figure 1-Figure 3As shown, the controller assembly 40 includes a controller body 41 disposed on the outer wall of the motor housing 11 and a controller cover 42 detachably connected to the motor housing 11. The controller body 41 is electrically connected to the motor winding assembly 15. The controller body 41 is directly disposed on the outer wall of the motor housing 11 without the need for additional installation space, making the structure of the entire motor more compact. This design is particularly important in space-constrained environments such as the deep sea, and can maximize the use of limited space. Moreover, the controller cover 42 is detachably connected to the motor housing 11, making the installation and removal of the controller body 41 simple and quick. This not only reduces the installation cost, but also facilitates subsequent maintenance and upgrade work.

[0048] Furthermore, the controller assembly 40 also includes a power device 43 and a capacitor 44 arranged between the controller body 41 and the controller cover 42. The power device 43 and the capacitor 44 are arranged side by side. A pin-fin heat dissipation structure 45 is provided on the controller cover 42. The pin-fin heat dissipation structure 45 includes hundreds of small cylinders. The heat of the controller heating elements including the power device 43 and the capacitor 44 is heat-exchanged with the seawater through this pin-fin structure, thereby transferring the heat to the seawater, thereby reducing the temperature of the controller. The innovation of the pin-fin structure is that it can increase the effective heat dissipation area by dozens of times, thereby greatly improving the heat dissipation efficiency, reducing the controller temperature, and reducing the risk of component overheating and burning. At the same time, the pin-fin area can be flexibly adjusted according to the heat generation of the capacitor 44 and the power device 43.

[0049] In this example, see Figure 1-Figure 3 As shown, the motor housing 11 includes a motor main housing 111 and a motor lower housing 112, the motor lower housing 112 is detachably connected to the motor main housing 111, the rear end cover 13 is detachably connected to the motor lower housing 112, one end of the motor shaft 16 is rotatably connected to the motor lower housing 112, and the other end is rotatably connected to one end of the motor main housing 111 away from the motor lower housing 112. By configuring the motor housing 11 to be a combination of the motor main housing 111 and the motor lower housing 112, it is more convenient to disassemble and install the motor body 10.

[0050] Specifically, the motor lower housing 112 is connected to the motor main housing 111 by screws, and the connection method is simple and reliable.

[0051] Specifically, one end of the motor shaft 16 is connected to the motor lower housing 112 through a bearing, and similarly, the other end of the motor shaft 16 is connected to the motor main housing 111 through a bearing.

[0052] Furthermore, a first annular portion 1111 and a second annular portion 1112 are radially extended from the outer wall of the motor main housing 111, and a connecting portion 1113 is respectively connected between the first end of the first annular portion 1111 and the first end of the second annular portion 1112 and between the second end of the first annular portion 1111 and the second end of the second annular portion 1112. The first annular portion 1111, the second annular portion 1112 and the connecting portions 1113 at both ends are surrounded to form a mounting groove 1114, and the controller body 41 is installed in the mounting groove 1114, and the controller cover 42 is arranged above the mounting groove 1114, and is detachably connected to the first annular portion 1111, the second annular portion 1112 and the connecting portion 1113. By directly forming the mounting groove 1114 on the outer wall of the motor body 10 shell, the controller body 41 can be tightly integrated into the motor structure, thereby reducing the need for additional space, making the overall size of the deep-sea motor more compact, which is conducive to installation and use in a limited space.

[0053] It can be understood that the controller may occupy only part of the circumference of the motor main housing 111 (for example, occupy 1 / 3 of the circumference of the motor main housing 111 ), or may be arranged around the entire circumference of the motor main housing 111 .

[0054] Optionally, a low-voltage connector 17 is provided on the rear end cover 13, and a high-voltage connector 18 is provided on the second annular portion 1112. The high-voltage connector 18 is responsible for receiving a high-voltage power supply from the outside to provide the required power supply for the deep-sea motor. This high-voltage power supply is usually used to drive the main working parts of the deep-sea motor, such as the motor rotor and winding assembly. The low-voltage connector 17 is used to receive a low-voltage power supply to provide power to the controller assembly 40 and other auxiliary components. These low-voltage power supplies are usually used for the transmission and processing of control signals, as well as to provide the necessary power support for the protection and monitoring functions of the deep-sea motor. In addition to the power supply, the high-voltage and low-voltage connectors 17 are also responsible for transmitting control signals from the controller. These signals are used to adjust the parameters such as the running speed, direction, and power of the motor to achieve precise control and regulation.

[0055] Furthermore, the motor body 10 also includes a rotary transformer assembly 19, which is sleeved on the motor shaft 16 and installed on the inner wall of the motor lower housing 112. The controller body 41 is electrically connected to the rotary transformer assembly 19. The rotary transformer assembly 19 can measure electrical signals such as position, angle, speed, and torque to achieve closed-loop control. The controller is responsible for receiving the position information of the motor rotor component 14 transmitted by the rotary transformer assembly 19, and controls the operation of the motor shaft 16 based on this information. The controller can also monitor the operating status of the motor shaft 16 and take corresponding protective measures when a fault occurs. In this embodiment, by changing the connection method of the winding and the signal selection plug on the rotary transformer assembly 19, the output voltage and frequency of the motor shaft 16 can be changed, thereby achieving speed control of the motor shaft 16 and reversal of the operating direction.

[0056] In this example, see Figure 2 As shown, a refueling piston 131 is provided on the rear end cover 13, and the refueling piston 131 allows lubricating oil to be added to the deep-sea motor during operation or maintenance of the deep-sea motor, which is essential to ensure adequate lubrication of the motor bearings, seals and other moving parts, and helps to reduce friction and wear, and improve the operating efficiency and life of the motor. Moreover, in the deep-sea high-pressure environment, the refueling piston 131 can also play a role in pressure balance. By adjusting the position of the refueling piston 131, the pressure difference between the inside and outside of the deep-sea motor can be balanced to prevent seal failure or damage caused by the pressure difference.

[0057] In this example, see Figure 2 As shown, the deep-sea motor also includes a planetary gear reducer (not shown), which is sleeved on the motor shaft 16 and located on the inner side of the first sealing assembly 20. After adding the planetary gear reducer, the output torque can be further increased, and the motor volume and torque are reduced, and the precious silicon steel sheets and copper wires and other materials used are reduced, thereby reducing costs. Furthermore, in the case of an integrated reducer, the deep-sea motor of the embodiment of the present invention can be changed into an integrated motor, controller, and reducer, becoming a highly integrated three-in-one structure.

[0058] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A deep sea motor, characterized in that: The invention comprises a motor body, a first sealing component, a second sealing component and a controller component, wherein the motor body comprises a hollow motor housing, a front end cover, a rear end cover, a motor rotor component, a motor winding component and a motor shaft, wherein the front end cover and the rear end cover are respectively arranged on the two end surfaces of the motor housing, the inner side wall of the front end cover is provided with an annular boss, and the front end cover is provided with a pressure relief hole at a position corresponding to the annular boss, the pressure relief hole is respectively communicated with the inner cavity of the front end cover and the outside, a pressure relief part is installed in the pressure relief hole, the motor rotor component is sleeved on the motor shaft, the motor winding component is arranged on the outer ring of the motor rotor component, the motor shaft is rotatably arranged in the motor housing, and the motor shaft passes through the front end cover, the motor shaft is provided with a first step and a second step, the first sealing component is arranged between the motor shaft and the front end cover, and is installed between the first step and the inner side surface of the annular boss, the second sealing component is arranged between the motor shaft and the front end cover, and is installed between the second step and the outer side surface of the annular boss, the controller component is arranged in the motor housing. On the outer side wall of the machine housing, the controller component is electrically connected to the motor winding component; the first sealing component includes a first moving ring and a first static ring, the first moving ring and the first static ring are respectively sleeved on the motor shaft, and the first moving ring is pressed on the first step, and the first static ring is pressed between the first moving ring and the inner side surface of the annular boss; the second sealing component includes a second moving ring inner ring, a second moving ring outer ring, a second static ring, a static ring sealing ring, a moving ring sealing ring and a moving ring limiter, the second static ring is sleeved on the motor shaft, and the first An annular protrusion is provided at one end of the inner ring of the second moving ring facing outward, a limited mounting hole is radially provided on the inner ring of the second moving ring, the inner ring of the second moving ring is sleeved on the motor shaft and pressed on the second step, the outer ring of the second moving ring is sleeved on the inner ring of the second moving ring and pressed between the second static ring and the annular protrusion, the static ring sealing ring is installed between the second static ring and the front end cover, the dynamic ring sealing ring is installed between the motor shaft and the second moving ring inner ring, and the dynamic ring limiting member is installed in the limiting mounting hole and abuts against the motor shaft.

2. The deep sea motor according to claim 1, characterized in that: The controller assembly includes a controller body and a controller cover, the controller cover is detachably connected to the motor housing, the controller body is arranged in a space enclosed by the motor housing and the controller cover, and the controller body is electrically connected to the motor winding assembly.

3. The deep sea motor according to claim 2, characterized in that: The controller assembly further includes a power device and a capacitor disposed between the controller body and the controller cover. The power device and the capacitor are disposed side by side, and a pin-fin heat dissipation structure is disposed on the controller cover.

4. The deep sea motor according to claim 3, characterized in that: The pin-fin heat dissipation structure includes a plurality of cylinders, and the plurality of cylinders are distributed on the controller cover at intervals.

5. The deep sea motor according to claim 2, characterized in that: The motor housing includes a motor main housing and a motor lower housing, the outer side wall of the motor main housing radially extends with a first annular portion and a second annular portion, a connecting portion is respectively connected between the first end of the first annular portion and the first end of the second annular portion and between the second end of the first annular portion and the second end of the second annular portion, the first annular portion, the second annular portion and the connecting portions at both ends enclose a mounting groove, the controller body is mounted in the mounting groove, and the controller cover is arranged above the mounting groove and is detachably connected to the first annular portion, the second annular portion and the connecting portion, the motor lower housing is detachably connected to the motor main housing, the rear end cover is detachably connected to the motor lower housing, one end of the motor shaft is rotatably connected to the motor lower housing, and the other end is rotatably connected to an end of the motor main housing away from the motor lower housing.

6. The deep sea motor according to claim 5, characterized in that: The rear end cover is provided with a low-pressure joint, and the second annular portion is provided with a high-pressure joint.

7. The deep sea motor according to claim 6, characterized in that: The motor body also includes a resolver assembly, which is sleeved on the motor shaft and installed on the inner wall of the motor lower housing. The controller body is electrically connected to the resolver assembly.

8. The deep sea motor according to claim 1, characterized in that: It also includes a planetary gear reducer, which is sleeved on the motor shaft and located on the inner side of the first sealing assembly.

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